Business Segments (Detail) - USD ($)	3 Months Ended
	Feb. 28, 2021	Feb. 29, 2020
Segment Reporting Information [Line Items]
Revenues	$ 1,481,500,000	$ 1,212,000,000.0
Operating income	236,300,000	194,200,000
Less: Special charges	1,100,000	1,000,000.0
Operating income excluding special charges	262,500,000	195,200,000
Income from unconsolidated operations	13,300,000	10,400,000
Business Acquisition, Transaction Costs	13,800,000
Transaction and integration expenses	18,800,000	0
Cost of Sales
Segment Reporting Information [Line Items]
Business Acquisition, Transaction Costs	6,300,000
Consumer
Segment Reporting Information [Line Items]
Revenues	946,800,000	699,500,000
Operating income	180,900,000	119,000,000.0
Less: Special charges	800,000	600,000
Operating income excluding special charges	189,900,000	119,600,000
Income from unconsolidated operations	10,800,000	7,800,000
Business Acquisition, Transaction Costs	4,000,000.0
Transaction and integration expenses	4,200,000
Flavor Solutions
Segment Reporting Information [Line Items]
Revenues	534,700,000	512,500,000
Operating income	55,400,000	75,200,000
Less: Special charges	300,000	400,000
Operating income excluding special charges	72,600,000	75,600,000
Income from unconsolidated operations	2,500,000	2,600,000
Business Acquisition, Transaction Costs	2,300,000
Transaction and integration expenses	14,600,000
Americas [Member]
Segment Reporting Information [Line Items]
Revenues	964,800,000	819,600,000
Europe Middle East And Africa [Member]
Segment Reporting Information [Line Items]
Revenues	302,400,000	250,300,000
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Revenues	$ 214,300,000	$ 142,100,000